<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <script>
    let num1 = Number(prompt('请输入第一个数：'))
    let num2 = Number(prompt('请输入第二个数：'))
    document.write(`两个数相加和为：${num1 + num2}`)

  </script>
</body>

</html>